[ 1493.105534][T22524] gre: GRE over IPv4 demultiplexer driver
[ 1493.557081][T22547] ip_gre: GRE over IPv4 tunneling driver
[ 1509.062380][T23119] ip6_gre: GRE over IPv6 tunneling driver
[ 1514.476782][T23369] ping (23369) used greatest stack depth: 23352 bytes left
[ 1519.265799][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1521.249760][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1523.040761][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1525.024763][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1544.258038][T24451] ping (24451) used greatest stack depth: 23264 bytes left